The ophthalmic part was described in detail by Höhn et al. [16 (link)]. In brief, the ophthalmic examinations included objective refraction and distance-corrected visual acuity (DCVA) (Humphrey Automated Refractor / Keratometer [HARK] 599; Carl Zeiss Meditec AG, Jena, Germany) and intraocular pressure (IOP) (Nidek NT-2000; Nidek, Co., Gamagori, Japan).
Self-reported eye diseases and history of any form of glaucoma surgery were assessed by questions during the eye examination. Participants were asked if they suffer from glaucoma, cataract, macular degeneration, corneal diseases or diabetic retinopathy. Additionally, participants were asked if they used any eye drops. Antiglaucoma eye drops were classified using the Anatomic Therapeutic Chemical (ATC) code, including following substance groups: Sympathomimetics (S01EA), Parasympathomimetics (S01 EB), Carbonic anhydrase inhibitors (S01EC), Beta-blockers (S01ED), Prostaglandins (S01EE).
Self-reported eye diseases and history of any form of glaucoma surgery were assessed by questions during the eye examination. Participants were asked if they suffer from glaucoma, cataract, macular degeneration, corneal diseases or diabetic retinopathy. Additionally, participants were asked if they used any eye drops. Antiglaucoma eye drops were classified using the Anatomic Therapeutic Chemical (ATC) code, including following substance groups: Sympathomimetics (S01EA), Parasympathomimetics (S01 EB), Carbonic anhydrase inhibitors (S01EC), Beta-blockers (S01ED), Prostaglandins (S01EE).
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